Part 2

Model 204.9 without code (615) Bi-xenon headlamp unit with integrated curve illumination and without code (621) Intelligent light system (left-hand traffic) and without code (622) Intelligent light system (right-hand traffic)
A1 Instrument cluster
A1e1 Left turn signal indicator light
A1e2 Right turn signal indicator light
A1e3 High beam indicator lamp
A1e18 Rear fog light indicator lamp (as of 1.6.09)
A1e57 Front fog lamp indicator lamp (as of 1.6.09 up to 30.11.09 and as of 1.12.09)
A1e67 Low beam indicator lamp
A1h1 Warning buzzer
A1h2 Turn signal light function check, acoustic
A1p7 Travel distance display (without code (442) Comfort multifunction steering wheel)
A1p13 Multifunction display (with code (442) Comfort multifunction steering wheel)
B38/1 Light sensor (without code (345) Rain sensor)
B38/2 Rain/light sensor (with code (345) rain sensor)
E1 Left front headlamp unit
E1e1 Left main beam
E1e2 Left low beam
E1e3 Left front side lamp and parking lamp
E1e5 Left front turn signal lamp
E1e6 Left front side marker lamp
E1m1 Left headlamp range adjustment actuator motor
E2 Right front headlamp unit
E2e1 Right main beam
E2e2 Right low beam
E2e3 Right front side light and parking light
E2e5 Right front turn signal light
E2e6 Right front side marker lamp
E2m1 Right headlamp range adjustment actuator motor
E3 Left rear lamp unit
E3e1 Left rear turn signal lamp
E3e3 Left backup lamp
E3e5 Left rear fog lamp
E3e9 Left stop lamp and taillamp and parking lamp
E4 Right rear lamp unit
E4e1 Right rear turn signal lamp
E4e3 Right backup lamp
E4e5 Right rear fog lamp
E4e9 Right stop lamp and taillamp and parking lamp
E5/1 Left front fog lamp (up to 30.11.09 and as of 1.12.09)
E5/2 Right front fog lamp (up to 30.11.09 and as of 1.12.09)
E6/3 Left rear side marker lamp (with code (460) Canada version or with code (494) USA version )
E6/4 Right rear side marker lamp (with code (460) Canada version or with code (494) USA version )
E6/5 Left outside mirror turn signal lamp
E6/6 Right outside mirror turn signal lamp
E19/1 Left license plate lamp
E19/2 Right license plate lamp
E21 Center stop lamp
N2/10 Supplemental restraint system control unit
N3/9 CDI control unit (with diesel engine)
N3/10 ME-SFI [ME] control unit (with gasoline engine)
N10/1 Front SAM control unit with fuse and relay module
N10/2 Rear SAM control unit with fuse and relay module
N15/5 Electronic selector lever module control unit
N28/1 Trailer recognition control unit (with code (550) Trailer hitch)
N30/4 Electronic Stability Program control unit
N69/1 Left front door control unit
N69/2 Right front door control unit
N73 Electronic ignition switch control unit
N80 Steering column module control unit
S1 Exterior lights switch
S1e1 Front fog lamp indicator lamp (up to 31.5.09)
S1e2 Rear fog light indicator lamp (up to 31.5.09)
S1e3 Standing light indicator lamp (up to 31.5.09)
S1s8 Headlamp range controller
S1s10 Rear fog light button (as of 1.6.10)
S1s11 Front fog lamp button (as of 1.6.10)
S4 Combination switch
S6/1 Instrument panel switch group
S6/1s1 Hazard warning flasher switch
S9/1 Stop lamp switch
S16/2 Backup lamp switch (on transmission 716)
X58 Trailer socket (with code (550) Trailer hitch)
CAN B Interior CAN
CAN C Drive train CAN
CAN E Chassis CAN
LIN 1 Instrument panel LIN
LIN 2 Wiper/inside rearview mirror LIN
A Vehicles up to 31.5.10
B Vehicles as of 1.6.10





Model 204.9 with code (615) Bi-xenon headlamp unit with integrated curve illumination or code (621) Intelligent light system (left-hand traffic) or code (622) Intelligent light system (right-hand traffic)
A1 Instrument cluster
A1e1 Left turn signal indicator light
A1e2 Right turn signal indicator light
A1e3 High beam indicator lamp
A1e18 Rear fog light indicator lamp (as of 1.6.09)
A1e57 Front fog lamp indicator lamp (as of 1.6.09 up to 30.11.09 and as of 1.12.09)
A1e67 Low beam indicator lamp
A1h1 Warning buzzer
A1h2 Turn signal light function check, acoustic
A1p7 Travel distance display (without code (442) Comfort multifunction steering wheel)
A1p13 Multifunction display (with code (442) Comfort multifunction steering wheel)
B22/7 Left rear level sensor
B22/8 Left front level sensor
B24/15 Yaw rate, lateral and longitudinal acceleration sensor
B38/1 Light sensor (without code (345) Rain sensor)
B38/2 Rain/light sensor (with code (345) rain sensor)
E1 Left front headlamp unit
E1e3 Left front side lamp and parking lamp
E1e5 Left front turn signal lamp
E1e6 Left front side marker lamp
E1e9 Left corner-illuminating fog lamp
E1e10 Left xenon bulb with integrated ignition module
E1l1 Left high beam solenoid
E1m1 Left headlamp range adjustment actuator motor
E1m2 Left active curve illumination actuator motor
E1n1 Left xenon lamp control unit
E1n4 Left xenon light power supply module
E1/3 Left daytime running lights headlamps (as of 1.12.09 with code (621) Intelligent Light System (left-hand traffic) or code (622) Intelligent Light System (right-hand traffic))
E2 Right front headlamp unit
E2e3 Right front side light and parking light
E2e5 Right front turn signal light
E2e6 Right front side marker lamp
E2e9 Cornering illumination, right
E2e10 Right xenon bulb with integrated ignition module
E2l1 Right high beam solenoid
E2m1 Right headlamp range adjustment actuator motor
E2m2 Right active curve illumination actuator motor
E2n1 Right xenon light control unit
E2n4 Right xenon light power supply module
E2/3 Right daytime running lights headlamps (as of 1.12.09 with code (621) Intelligent Light System (left-hand traffic) or code (622) Intelligent Light System (right-hand traffic))
E3 Left rear lamp unit
E3e1 Left rear turn signal lamp
E3e3 Left backup lamp
E3e5 Left rear fog lamp
E3e9 Left stop lamp and taillamp and parking lamp
E4 Right rear lamp unit
E4e1 Right rear turn signal lamp
E4e3 Right backup lamp
E4e5 Right rear fog lamp
E4e9 Right stop lamp and taillamp and parking lamp
E5/1 Left front fog lamp (up to 30.11.09 and as of 1.12.09 without code (621) Intelligent Light System (left-hand traffic) and without code (622) Intelligent Light System (right- hand traffic))
E5/2 Right front fog lamp (up to 30.11.09 and as of 1.12.09 without code (621) Intelligent Light System (left-hand traffic) and without code (622) Intelligent Light System (right- hand traffic))
E6/3 Left rear side marker lamp (with code (460) Canada version or with code (494) USA version )
E6/4 Right rear side marker lamp (with code (460) Canada version or with code (494) USA version )
E6/5 Left outside mirror turn signal lamp
E6/6 Right outside mirror turn signal lamp
E19/1 Left license plate lamp
E19/2 Right license plate lamp
E21 Center stop lamp
N2/10 Supplemental restraint system control unit
N3/9 CDI control unit (with diesel engine)
N3/10 ME-SFI [ME] control unit (with gasoline engine)
N10/1 Front SAM control unit with fuse and relay module
N10/2 Rear SAM control unit with fuse and relay module
N15/5 Electronic selector lever module control unit
N28/1 Trailer recognition control unit (with code (550) Trailer hitch)
N30/4 Electronic Stability Program control unit
N49 Steering angle sensor
N69/1 Left front door control unit
N69/2 Right front door control unit
N73 Electronic ignition switch control unit
N80 Steering column module control unit
S1 Exterior lights switch
S1e1 Front fog lamp indicator lamp (up to 31.5.09)
S1e2 Rear fog light indicator lamp (up to 31.5.09)
S1e3 Standing light indicator lamp (up to 31.5.09)
S1s10 Rear fog light button (as of 1.6.10)
S1s11 Front fog lamp button (as of 1.6.10)
S4 Combination switch
S6/1 Instrument panel switch group
S6/1s1 Hazard warning flasher switch
S9/1 Stop lamp switch
S16/2 Backup lamp switch (on transmission 716)
X58 Trailer socket (with code (550) Trailer hitch)
CAN B Interior CAN
CAN C Drive train CAN
CAN E Chassis CAN
CAN G Front end CAN
CAN H Vehicle dynamics CAN
LIN 1 Instrument panel LIN
LIN 2 Wiper/inside rearview mirror LIN
LIN G1 Left headlamp LIN
LIN G2 Right headlamp LIN
A Vehicles up to 31.5.10
B Vehicles as of 1.6.10

Function requirements, general
^ Circuit 30 ON

Exterior lights (ABL), general
The exterior lights control all the safety and comfort-relevant functions of the front, side and rear lights of the vehicle.
The exterior lights system includes the following subfunctions:
^ Function sequence for on-board electrical system increase
^ Function sequence for switching off the exterior lights
Further subfunctions are described in separate documents:
^ Standing/parking lights actuation, function
^ Driving lights actuation, function
^ Additional functions for driving lights actuation, function (with code (614) Bi-xenon headlamp unit or code (618) Bi-xenon headlamp or code (615) Bi-xenon headlamp unit with integrated curve illumination or code (616) Bi-xenon headlamp unit with integrated asymmetric curve illumination or code (621) Intelligent Light System (left-hand traffic) or code (622) Intelligent Light System (right-hand traffic))
^ Front fog light actuation, function
^ Turn signal light actuation, function
^ Brake lights actuation, function
^ Backup light actuation, function
^ Headlight switch off delay, function
^ Substitute lights and emergency lights actuation, function

Function sequence for on-board electrical system increase
When the on-board electrical system voltage is decreased by the on-board electrical system management below the minimum voltage of a light function during normal driving operation, the front SAM control unit can suppress shutoff of the corresponding light function with the aid of the on-board electrical system increase. For this purpose, the front SAM control unit requests the minimum voltage necessary for the corresponding light function. The light functions for which the on-board electrical system increase is activated can be defined at the end of production.
The following functions can be coded:
- Low beam actuation when dark (without code (614) Bi-xenon headlamp unit and without code (618) Bi-xenon headlamp and without code (615) Bi-xenon headlamp unit with integrated curve illumination and without code (616) Bi-xenon headlamp unit with integrated asymmetric curve illumination and without code (621) Intelligent Light System (left-hand traffic) and without code (622) Intelligent Light System (right-hand traffic))
- Backup light actuation
- Actuation of front fog lights (up to 30.11.09 and as of 1.12.09 without code (621) Intelligent light system (left-hand traffic) and without code (622) Intelligent light system (right-hand traffic))
- Rear fog lights actuation

Function sequence for switching off the exterior lights
Switching off the exterior lights prevents the on-board electrical system battery (G1) from being discharged by the active low beam and standing light actuation.
The low beams may be switched on due to the auto on/off headlamps, the daytime running lights or manually via the exterior lights switch.
A prerequisite for this is that the status of circuit 15 is On.
If circuit 15 is Off, the low beams are switched off.
The standing lights may be on due to the low beams having been manually switched on, due to the auto on/off headlamps or the daytime running lights, or they can be switched on manually via the exterior lights switch.
If the standing lights have been activated because of the manually activated low beams, auto on/off headlamps or the daytime running lights, and the driver door is opened at circuit 15C ON, the standing lights are switched off.
If the standing lights were manually switched on (exterior lights switch set to the standing lights position) then, on vehicles up to model 204.0/2 up to 28.2.11, model 204.9, they are not switched off.
In model 204.0/2 as of 1.3.11, model 204.3, the standing lights are switched off when the on-board electrical system management determines that the engine's starting capability is impaired because the on-board electrical system battery has been discharged.
If the "Ambient illumination" function is activated via the instrument cluster, it automatically switches itself on when the engine is turned off. The standing lights remain switched on for a fixed time interval of t = 60 s.
The "Ambient illumination" function is described in the "Headlamp switch-off delay (SWA) function" document.